Taxon Details
Calamagrostis crassiglumis
Thurber's reed grass
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Taxon Summary:
Calamagrostis crassiglumis, commonly known as Thurber's reed grass, is a perennial rhizomatous herb in the Poaceae that is found in California and elsewhere. It occurs within Coastal scrub (mesic), and Marshes and swamps (freshwater), growing at elevations from 10 to 60 meters. Calamagrostis crassiglumis is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.|
Scientific Name: Calamagrostis crassiglumis Thurb. |
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Common Name: Thurber's reed grass |
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| Family: | Poaceae | |
| Element Code: | PMPOA17070 | |
| USDA Plants Symbol: | ||
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 2B.1 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G5Q |
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State Rank: |
S2 |
| Other Status: | |
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CRPR Changes: changed from 2.1 to 2B.1 on 2013-09-13 removed from 2.1 on 2013-02-01 |
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| Add Date: | 1980-01-01 |
| Date Edited: | 2024-08-06 |
| Lifeform: perennial rhizomatous herb | ||||||||||||||
Blooming Period: May-Aug
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Elevation:
10 - 60 meters 35 - 195 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: |
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Threats: Threatened by grazing at Pt. Reyes NS. |
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Taxonomy: A synonym of C. stricta ssp. inexpansa in TJM (1993) and TJM 2; distinguished from this taxon in glume texture and shape: C. crassiglumis has thickened glumes that are rounded towards the base (vs. membranous, not thickened glumes that are keeled towards the base), generally shorter ligules (1-3 mm long vs. 2-5.5(6) mm long), and generally shorter panicles (3-8 cm long vs. (5)8-15 cm long in C. stricta ssp. inexpansa). |
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| Threat List Total: | 4 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 5 | 33 % |
| THREAT LIST: | ||
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| Grazing | 5 | 33% |
| Non-native plant impacts | 1 | 6% |
| Road/trail construction/maint. | 1 | 6% |
| Foot traffic/trampling | 1 | 6% |
| Total Occurrences: | 15 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 2 | 2 | 0 | 0 | 10 |
| Occurrence Status: | |||||
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| Historical >20 Years | 15 | ||||
| Recent <=20 Years | 0 | ||||
| Presence: | |||||
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| Presumed Extant | 15 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) Arizona (AZ), California (CA), Colorado (CO), Idaho (ID), Nevada (NV), New Mexico (NM), Oregon (OR), Utah (UT), Washington (WA), Wyoming (WY) |
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California Counties and Islands: Name (Code) Del Norte (DNT), Humboldt (HUM), Marin (MRN), Mendocino (MEN), Sonoma (SON) |
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Quads: Name (Quad Code) Ah Pah Ridge (4112348), Bodega Head (3812331), Crescent City (4112472), Drakes Bay (3812218), Fern Canyon (4112441), High Divide (4112481), High Plateau Mtn. (4112388), Holter Ridge (4112338), Inglenook (3912357), Mendocino (3912337), Orick (4112431), San Rafael (3712285), Sebastopol (3812247), Sister Rocks (4112462) |
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Notes:
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Presumed Extant
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